Piston-meter for fluids



3 SheetsSheet 1.

(N0 M-odeL) H. M. BARTLETT.

PISTON METER FOR FLUIDS.

Patented Dec. 1, 1885.

Wfirvass 654 (No Model.)

Patented Dec. 1, 1885.

2 t e e h S P t e e h S 3 & m U L m LR m R w M N 0 M I P (No Model.) SheetsSheet 3.

H. M. BARTLETT.

PISTON METER FORTLUIDS. No. 331,605. Patented Dec. 1, 1885.

Wv trwss as. I700 6717607 UNITED STATES PATENT OFFICE.

HENRY M. BARTLETT, OF BOSTON, MASSACHUSETTS PISTON-METER FOR FLUIDS.

SPECIFICATION forming part of Letters Patent No. 331,605, dated December 1, 1885 Application filed February 14, 1885. Serial N0.155,93S.

To aZZ whom it may concern:

Be it known that I, HENRY M. BARTLETT, of Boston, (Somervilla) in the county of Middlesex and .State of Massachusetts, have invented certain Improvements in Fluid-Meters, of which the following is a specification.

This invention has for its object to provide a simple, accurate, and durable meter of the class in which reciprocating pistons act on a D-valve which directs a portion of the incoming water alternately against opposite ends of a piston-reversing valve having ports communicating with fixed ports in the casing, whereby the incoming water is directed first against one piston and then against the oiher, and is thus caused to reciprocate the pistons, the water expelled by ear-h piston passing to the outlet.

The invention consists in the several improvements, which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a longitudinal vertical section of my improved meter. Fig. 2 represents a top view of the piston-reversing valve and the portion of the casing on which it works. Fig. 3 represents a side view of the piston-reversing valve and asection of a portion of the casing. Fig. 4 represents a section on line mm, Fig. 3. Fig. 5 represents an end elevation of the meter with one end or head removed. Fig. 6 represents a section on line y 3 Fig. 1. Fig. 7 represents a section on line 2 2, Fig. 5, looking upwardly. Fig. 7 representsa section on line 2 2, Fig. 5. Fig. 8 representsa longitudinal vertical section of a portion of the meter, showing the parts in different relations from those shown in Fig. l.

The same letters of reference indicate the same parts in all the figures.

In the drawings, or represents the casing, having the central induction-chamber, 2, and the cylindrical portion or piston-chambers 3 4, in which the pistons 12 b reciprocate, said pistons being rigidly connected and moving (N0 model.)

ing valve fitted to slide in a chamber below the valve-seats c c, and having a flat upper surface fitting said valve-seats. The valve f is provided near one end with two'ports, g h, which register alternately with the port d in the valveseat c, and near the other end with two ports, 9 h, which register alternately with the port (I in the valve-seat c. The valve-ports h and h communicate with an eduction-chamber, r, at the central portion of the valve f, which chamber communicates with the edilction-passagej in the lower portion of the casing, while the valveports g and g communicate, respectively, with passages k and k, which open into the induction-spaces 2 2 between the sides of the valve f and the casing a, said spaces communicating with the induction'chamber 2. The ports h h are therefore outlet-ports while the ports 9. g are inlet-ports.

Z Z represent ports in the upper surface of the valve f, between the ports 9 h and g h. The port Z communicates through a passage, m, with a chamber, n, at one end of the valvef, and the port Z communicates through a passage, m, with a chamber, at, at the opposite end of the valve. The chambersn n have openings 0 0 communicating with the interior of the casing at the ends of the valve f, so that water can flow through either of said ports, passages, and chambers into the casing at either end of the valve 7, and can return through the same channels, as hereinafter described.

19 represents an outlet-port in the valve f, between the port s l and Z, said port communicating with the eduction-chamber i.

q represents a D-valveresting on the upper surface of the valve f and formed to connect either of the ports Z or Z with the port p, ac cording to its position. The valve (1 projectsupwardly into the space between the pistons b b, so that as each piston approaches the end of its stroke it will strike said valve and change its position, thus causing it to alternately connect the port Z and the portl with the port 1).

The operation is as follows: When the valve fis in the position shown in Fig. 1, the valveport h connects with the casing-port d, so that water from the piston-chamber 3 can pass through the passages e e and ports d and h into the eduction-chamber and out from the meter, and the valve-port g connects with the casing-port d, so that water from the induction-chamber can flow through the spaces 2 2, passages k 70', ports 9 d, and passages e e into the piston -chamber 4. The incoming water therefore acts on the piston b and presses both pistons in the direction indicated by the arrow in Fig. 1, thus causing the piston b to expel the water from the portion 3 of the easing through the course above indicated. When the pistons nearly reach the end of their movement in the direction indicated in Fig. 1, the piston b strikes the D -valve q and causes it to connect the port Z with the outlet-port p, and at the same time uncover the port I, as shown in Fig. 8. Water from the induction-chamber 2 now passes through the port Z, passage m, and chamber ninto the casing at the left-hand end of the valvef and forces said valve from the position shown in Fig. 1 to that shown in Fig. 8, the water in the casing at the opposite end of the valve f being displaced by this movement and flowing through the chamber n, passage m, and connected portsl and p to the eduction-chamber. This change in the position of the valve f connects the pistonchamber 4 with the eduction-chamber and the piston-chamber 3 with the induction-chamber, thus causing the incoming water to enter the chamber 3, reverse the movement of the pistons, and expel the water from the chamber 41.. During the ensuing movement of the pistons the piston b strikes the valve q and moves it to the position shown in Fig. 1, thus allowing water from the induction-chain ber to enter the casing at the right-hand end of the valve f and move the valve so as to connect the induction-chamber with the chamber 4 and the eduction-chamber with the chamber 3. The movement of the pistons is thus again reversed, and so the operation continues.

The reciprocating pistons operate suitable mechanism (not shown) whereby the quantity 1 ends of the casing and will be cushioned by the water therein.

In the semi-cylindrical external surface of the valve f are formed grooves u, coinciding with the ports gg h h in the flat surface of the valve, and receiving water for the purpose of balancing the valve, and thus enabling it to reciprocate easily the water entering the grooves a and bearing against the external surface of the valve outside of thepoints where the water entering said ports bears against the interior of the valve.

The bar 12 which connects the pistons 12 b, is provided with radial rings 12 The water entering the inductionchamber acts on said wings and rotates the pistons at a very slow rate, but sufficiently to cause their surfaces and the surfaces of the piston-chambers to wear evenly. An opening, a is provided in the upper portion of the casing, through which passes that portion of the indicating mechanism which is acted on by the pistons to indicate the quantity of water.

Any of the well-known forms of indicating mechanism adapted to be operated by thereciprocating pistons may be employed, and as I have not devised anything novel in said mechanism Ihave not thought it necessary to illustrate it in the drawings.

I claim- 1. The combination of the piston-reversing valve having the central ports ll, communicating through the valve with the opposite ends of the casing, the central outlet-port, p, and the ports 9 h and g h, arranged at opposite sides of the ports Z, Z, and p, and communicating,respectively,with the inlet and outlet, the casing having theinduction and piston chambers, and the valve-seats having ports (1 d, communicating with the outer portions of the piston-chambers, the D-valve resting on the central portion of the piston-reversing valve, and the reciprocating pistons adapted. to operate the D-va-lve, as set forth.

2. The piston-reversing valve having the central ports, ZZ, communicating with the easing at the opposite ends of the valve, the central outlet-port, p, the D-valve connect-ing the ports Z Z alternately with the port 19, and the inlet and outlet ports arranged in pairs at opposite sides of the central ports, combined with the casing having the induction and piston chambers, the ports (1 d, communicating with the outer ends of the piston-chambers, and coinciding alternately with the inlet and outlet ports of the valve, and the pistons reciprocating in said chambers and operating the D-valve, as set forth.

3. The semi-cylindrical piston reversing valve having the inlet and outlet ports in its fiat side, and the grooves in its outer or semicylindrical surface coinciding with said ports, whereby the valve is balanced, as set forth.

4:. The reciprocating pistons having the ra dially-winged connecting -bar, whereby the water entering the meter is caused to rotate the pistons, as set forth.

In testimony whereof Ihave signed my name to this specification, in the presence of two subscribing witnesses, this 6th day of February, 1885.

HENRY M. BARTLETT. Witnesses:'

O. F. BROWN, H. BROWN. 

